Deoxygenated blood enters the lungs from the right side of the heart and travels to the lungs. When you inspire, oxygen flows into the lungs, transverses the capilliares and attaches to hemoglobin down a gradient. At the same time, co2 diffuses into the capilaries and is expelled with exhalation. Oxygen rich blood then flows to the left side of the heart and into the circulation for cellular use.
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2

Could be a factor.:
A virus is required to catch a cold. Cold, dry air ^’s nasal mucus production ; viscosity. Mucus is part of our body’s defense mechanism. It traps viruses ; other particles. When the mucus is thick (sluggish) it makes removing viruses more difficult. Another function of the nose is to warm cold air before it moves to the lungs. Capillaries in the nose dilate to bring warm blood to the nares. As.
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3

Yes, but...:
Humidifier does provide extra moisture to upper airway, i.e., nose and throat. However, high humidity over 60% provides a favorable environment for the molds to grow and may aggravate asthma and allergy symptoms.
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7

Possible:
If not maintained and cleaned well yes. These may become dirty and not function well. Also depends on the type of cleaner. Some are electrostatic or ionized. Most likely it is the surrounding enviorment not the machine if working well.
Need to trouble shoot more.
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11

Depends on how much:
Pollution and how much smoking. If you live in beijing, the answer might be pollution is as bad or worse than a half-pack of cigarettes per day. If you live in the average american city, smoking is much worse if you are smoking more than a cigarette or two per day. Air pollution has different toxins and they may be worse for some people- like hydrogen sulfide and particulate matter.
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13

Not likely:
Non-trauma, spontaneous pneumothorax occur as a result of an abnormality in the lung tissue. Risk factors for primary and secondary spontaneous pneumothorax (sp) include: smoking (including marijuana), tall thin stature in otherwise healthy, connective tissue disorders, pregnancy, familial history. Dry air is not generally a risk factor.
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15

Usually:
Dry (and cold) air is particularly bad for exercise induced asthma and that frequently causes cough. Swimming was always said to be better than running for asthma, but now with public pools so highly chlorinated, that also often makes asthma worse. For nasal allergies, the best way to humidify is to use saline nasal spray or flush.
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19

No it cannot:
No heat cannot dry or irritate your vagina. That is unless you are applying a hair drier directly to that area for a long period of time. Is there something particular you are concerned about?
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20

Possibly helpful:
Some evidence exists for using positive pressure or incentive spirometry to enhance lung capacity. Any deep breathing exercise or activity such as swimming or playing wind instruments may be helpful as well. JDF1?
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Increasing the humidity in your home helps eliminate the dry air that can irritate and inflame the passages in the nose and throat. Humidified air can relieve the discomfort of colds and the flu. Using a humidifier in the home can help relieve a stuffy nose and can help break up mucus so you can cough it up.
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